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Ok guys I have a SBC with a F3 123 Prochargre reverse rotation I was putting the balancer on and found that my callies crank has double 3/16 key ways. My ATI blancer has a 3/16 and a 1/4 key way. Can I get away with using the 3/16 key ways or should I have the crank cut for one 1/4 or 2 1/4 key ways?
 

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Ok guys I have a SBC with a F3 123 Prochargre reverse rotation I was putting the balancer on and found that my callies crank has double 3/16 key ways. My ATI blancer has a 3/16 and a 1/4 key way. Can I get away with using the 3/16 key ways or should I have the crank cut for one 1/4 or 2 1/4 key ways?
Big block or small block snout? If it's big block snout I've used (2) 3/16 for the past few years without any problems. How about a step key?
 

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ATI makes 1/4 to 3/16 step key for $22...
 
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